Some Die Telling

Fiona Shaw is missing. Her sister Ellen, who has come to London to work with Fiona's boss, is worried. Why isn't Fiona's fiance more worried?
TThere are some explicit sex scenes.

Long Synopsis:

From the cover flap: "Ellen Shaw arrives in London expecting to join her sister Fiona, who's found her the perfect job managing an antiquarian bookshop. Instead she finds an empty apartment, and no sign of her sister. Ellen's only contact is Hugh Weston, Fiona's boss and the bookshop's owner. Though Hugh seems solid and dependable, he remains a stranger she's not sure she can trust. Hugh has his own theories about Fiona's disappearance: his grandmother had beenmurdered only days before, and Hugh suspects Fiona had something to do with it. As danger begins to stalk Ellen through the streets of London, Hugh has only moments to decide if she's Fiona's partner in crime...or an unlucky pawn who needs hs help."